@TEWphotography just about all of your issues are covered by posts already made to this forum as well as how to resolve them. The search feature is your friend. I’ll start you off with logging. As someone who has over 60 devices most of which are not supported, my environment is fairly stable and I do have some complex automations, I use modes and SHM and this is how I troubleshoot my own issues.
As a side note any threads where @JDRoberts has left a comment treat them as gold. He has a better grasp of the technologies at play than just about anyone.
If research is not your thing you can always wait for support@smartthings.com to get back to you, but I find that the more u know the less you’ll u complain.